Magneto-generator.



J. L. MILTON.

MAGNET@ GENERATOR. APPLIUATION HLED o'o'r. 2a, 1910.

2 SHEETS-EEEBT 2.

Wil-n' 'E' 'SEEE In'verr John L.M11TET1 f n aun-1, Tulane gfsl@ Patented @y1-2,1914;

475,171, filed January 80, 1909. earlierv application I disclosed an inductor which the following is a full, clear, concise,

. to the accompanying drawings, forming a ciated, there being provided avset of springs JOHN .LEWIS MILTON, OF .lIFFlN, OHIO.

' Mestiere-GENERATOR# To all ywho/1n tt may concern 'A Be it known that I, JOHN L; MILTON, a citizen of the United States, residing A at Titin, in the county of Seneca and State of Ohio, have invented a certain new and useful Improvement-Tin- Magneto-Generators, of

and exact description, reference being had part of this specification.

My invention relates to magneto generators and ignition mechanism for use in connection with internalcombustion engines.

The object of my present invention is to obtain a cheap and eiicient construction while at the sametime a construction which will prevent `undue hammering of the ignition contacts.

One of the principal features of my invent-ion resides in .a malleable iron. castingv and the parts with which it coperates in causing the oscillation ofthe generator inductor and in controlling the'movements of the sparkcontacts. The use of this single' malleable iron casting provides a rigid construction and at the same time one which transmits the necessary motion from the engine mechanism to the inductor of the generator, and which also by means of a cam surface carried on one of its arms actuates the contact-mechanism to cause a sudden separation of the contacts followed, however, by a slow and easy rengagement thereof. Since in the construction of my invention these spark contacts are brought slowly and easily together, excessive wear is avoided by the prevention of hammering' which wouldotherwise take place.

My :present invention may in a general way be regarded as an improvement upon co-pending application, Serial No. In that generator having stationary windings and an oscillating inductor, this inductor being actuated in onedirection by, power supplied from the engine with which it was assofor returning the inditctor sharply to its normal .position and beyond, when the in-` ductor was released.

My present invention also utilizes a set ofsprings :for returning the inductor inareverse ebtion whenever it is released by the 1 j Specification of Letters Patent. `P3tentgdlay .ilpplicaton'led 0ctober`28, j

1910. seriarnasaasca.

.K mechanism .which-actuates .the inductorto' carry itinto its abnormal position..

My, present .invention consistsalso lnfa'nA arrangement whereby unnecessary hammer-V ing of therontacts is avoidedwhere thev reciprocations. of the operating rod are more frequent than the ignition periods, this ar# rangement Aconsisting of ,mechanism for throwing the inductor out ofaction except-y during such time 'as the spark is required to pass for lgnition purposes. These and .the various other features of my invention will be more`l clearly under-q drawings, in whichstood by reference tothe accompanying Figure 1 is a front elevation` the .gen-.vl .erator and its associated parts; Fig. 2 is a plan view thereof; Fig. 3 is an end elevation; Fig. 4' is an isolated elevation of the.y actuating mechanism. f i Like reference characters aregapplied to the same parts throughout the various gg.

ures.

The generator proper comprises the ,per-'- manent magnets 1', 1, whose consequent poles are secured to the endsy of the 4pole-'pieces 2 and 3. The bands .4, .4 clamp the' magnets together and hold them in position upon the y laminated pole-pieces. j `Each of the pole-pieces is provided with three polar projections 5, 5, the middleprovjection in Veach instance carrying a winding G. Rotatably mounted within the embrace of the polar projections is the inductor' 7 carried upon theshaft 8.y IThis 4inductor has generally thev shape of a Maltese cross with diamet-rically opposite arms' adapted when in one position to convey the magnetic tlux of the permanent ,magnets through the l polar'projections on which the .windings 6 are laid and when in the alternate. position to shortscircuit the magnetic flux around these central poles. l l

The shaft 8, which carries the oscillating;

inductor is journaled in the bracket. 9- w'hiohf,kk

extends from.the plate 10, this plate being.y provided with openings 1`1, 1l,y through which bolts pass to secure the plate directly to the cylinder or other combustion chamberof an mternal combustion engme. The arms of a brass spider 13 are attached to the polar its projections of the .field magnet by thebolts f 14, 14, the'hub of the spider in turn being mounted upon a bossl extendingifrom the provided with two arms 16, 16 which extend from diametrically opposite sides of the hub, where they turn and become parallel with the shaft 8 at diametrically opposite positions. At the end of each arm is a grooved roller 17. The free ends of the helical actuating springs 18, 18 are hooked over these rollers1 the other ends of the springs being hooked over similarly grooved rollers 19, 19 carried by -posts 20, 2O extending from the field pole-pieces 2 and 3. These posts are mounted at diametrically opposite points, wherefore the actuating springs tend always to return the yoke l5 and thus the inductor to their normal position.

A steel faced operating arm 21 extends upwardly from the hub of the yoke15 where it is adapted for engagement. by the end of the recij'irocating rod 22 connected and driven in any suitable manner from the shaft of the engine with which the ignition mecl1 anism is associated. A roller 23 carries the free end ofthe actuating rod 22 except when the lower cam surface of the adjustable sleeve 24 rides up on the roller to disengage the end of the actuating rod from theface of the operating arm 21. The exact time in the cycle of the engine at which this release of the yoke and hence of the inductor takes place may be regulated by adjusting the position of the sleeve 24, the set screw and nut 25 serving to maintain the proper adjustment. The hardened steel face 26 of the operating arm 21 will prevent undue wear at this point.

The roller 23 is eccentrically mounted upon a post 27 which is carried by an arm 28 extending from the bracket 9. A. starting lever 29 is keyed to the end of the post 27 whereby the post may be turned in one direction or the 'other to raise or lower the roller 23 due to its eccentric mounting upon the end of the post. A small spring 30 connected with the starting lever 29 and with the extension 28 tends to hold the starting lever always in the running position. When it is desired to retard the production of the spark at the Contact points as in starting thc cnginethe lever 29 is thrown manuallyinto a position in which the roller. 23 is lowered, thereby delaying slightly the disengagement of the end of thc actuating rod from the corner of the operating arm 21 and thus delaying also lthe spark production.

Coming now to the mechanism for controlling the operation of the contacts, a boss 31 ,will be seen to extend from the bolting' ,tact arm or crank plate 10. Through this extendsa spindle 32. At the end of the spindle is a swinging' con-` 33 upon which is mounted the platinum or other contact point 34 adapted for operation with the contact point 35, mounted upon the post 36 suitably insulated from the plate 10 and the other parts of the mechanism. The post., 3GV terminates in a binding' screw 37 to which the conductor leading from one cnd of the field magnet windings is electrically connected. At the other end the contact spindle 32 is provided with an L-shaped arm 38 through which passes the adjusting screw 39 of t-he anvil 41, the lock nut 40 serving to maintain the adjustment. A very light helical spring 42 surrounds the spindle 32 between the plate 10 and the arm 38 and, being connected at one end with the plate 10 and at the other end with this actuating crank 38, it tends to turn thespindle 32 in a direction which will bring the contact points 34 and 35 into, en gagement with one another. The drawings show these severaly parts in their normal positions.

The position ot' the. anvil 41 is such that the'upper surface of an arm 1.6 of the yoke 15 will engage it to cause a separation of the contact points 34 and It will be noted that the arm 1G forms a curved cam surface a adapted to engage the lower side of the anvil 41 whereby'the overrunni'ng of the .inductor and yoke piece 15 upon their release from the actuating rod 22 will cau-se this cam surface to engage the anvil with a sharp sudden hammer-like blo-w, thus causing a correspondingly sudden opening of the contact points 34 and 35. The actuating. springs 18 promptly return the yoke member 15 to its normal positionafter the 105 overthrow whichl follows the release of its operating arm 21 from the pressure of the actuating rod 22. During this'return movement the anvil 4l rides smoothly and easily over the curved cam surface of the engaging arm 16 of the yoke 15. The light spring 42 causes the actuating crank 38 to follow the yokearm 16 in this return movement, thereby causing the contact points 34 and 35 to be returned slowly and easily to their normal contact positions. The surface of the arm which acts as a cam in conjunction with the anvil 41 is curved as shown in the drawing to avoid the pounding of the con-- tact mechanism. The distance between the anvil 41 and the coperating cam surface a of the yoke arm may be adjusted to cause the contact points 34 and 35 to separate just at the proper point. in the current wave production.

An auxiliary roller 43 is mounted upon a bell crank lever 44, this bell crank lever being pivot-ally mounted on the post 27, The depending arm 44 is adapted to `be controlled. by the engine governor. Thus when '130 the speed of the engine exceeds the limit for which the governor is set, the roller 4 3 is elevated to lift-the 4actuatingrod' 22 clear of the operatin arm Q1, thus preventing the oscillation of tie inductor and at the same time the actuation of the contacts 34 and 35.

While I have shown and described a preferred embodiment of my invention, it will be apparent to those skilled inthe art that many modifications may be made without departing from the spirit thereof.

What I claim as new and desire to secure by Lettersr Patentis:

l. In combination, a field magnet, an inductor mounted upon a shaft for oscillation relative to the lield magnet, a yoke mounted upon the shaft for oscillation with the 'induct r, an operating arm carried by the yoke, a reciprocating member driven by an internal combustion engine to engage the operating arm to swing the yoke in one direction, means for disengaging the `reciprocating member from the operating arm to permit the oscillating parts to return to their normal position,- spring mechanism connected with the diametrically opposite arms of the yoke, to return it to the normal position when relieved of the pressure of the reciprocating member, a curved cam surface on one arm of the yoke, a Xed electrical contact and a swinging electrical contact in the combustion chamber of the internal combustion engine, a spindle upon which the swinging contact is mounted, a push finger mounted upon the contact and spindle and carrying an anvil normally disengaged from the cam-surface of the yoke but adapted to be engaged by the cam surface upon the overthrow of the oscillating yoke to separat-e the Yelectrical contacts, and a light spring acting to bring the swinging contact and the push finger into their normal positions, A 2. In a device of the class described, 'a suitable lfield magnet, an inductor adapted for oscillating with respect to the field magnet, a .yoke rigidly connected with the inductor and having projections at diametrically opposite l points, main actuating springs connecting the-projections of the yoke with suitable stationary project-ions on the frame, the said actuating springs tending always to return the oscillating members to their normal positions, a vpair of electrical contacts in the combustion chamber of an internal combustion engine, a light spring tending to maintain the closure of said electrical contacts, a push ringer adapted when struck to separate the electrical contacts against the tension of the light spring, a curved cam surface on the yoke adapted to engage the push finger upon the overthrow of the yoke 'when returned to its normal position by the main actuatin springs, an operatingar'nr associated ,wi

the yoke, and reciprocating mechanism driven by the internal combustion engine to engage the loperating arm to swing the yoke and the inductor,out oftheir normal position.

3. In a combination of a field magnet, an inductor mounted for-[oscillation within the ield magnet, a pair of main actuating springs, each connected at vone end with the field magnet frame",I an integral yoke member rigidly connected with the inductor, the main actuating lsprings being connectedat their free ends with,v they said yoke member, an operating arm costitituting a part of the integra-l yoke memberand'` adapted to be engaged by a reciprocating member driven by an internal combustion engine, separable contact points withinthe combustion chamber of the internal combustion engine, a'.

light spring tending to maintain theclosure of the electric adapted to be engaged by a. cam surface on the yokemember to cause the separat-ion of said contacts in opposition to the tension of the saidlight spring.

4.- 'In' 'a combination of a field magnet, an inductor mechanism tending' to return the inductorl to its normal position when moved out of said normal position, anl operating arm for turning the inductor out of its normal position, a reciprocating actuating rod driven from the shaft of an internal combustion engine, the end of the reciprocating rod being adapted normally to engage .the end of the inductorloperating arm, means for' shifting the path of travel of the reciprocating rod to determine its engagement with the 'operating arm, generating windings supported by the field magnet, separable elec-t trical contacts inthe combustion chamber of the engine, and a member fixed relative to the in'ductor adapted to .eliect the operation of said contacts to create an ignition spark within the combustion chamber of the engine.v

5. In a -ield magnet, an inductor mounted for oscillation therein, an operating arm for said inductor, a reciprocating actuating roddriven from 'the shaft 0f `an internal combustion engine, the end of the reciprocating rod adapted normally to engage the end of the inductoreoperating arm, generating windings supported by the field magnet, separable electrical contacts in the combustion chamber ofthe engine, and an impact member xed relativelyto the inductor adapted to separate saidcontacts to create a spark in lthev combustion chamber.

6. In a field magnet,l a shaftifaninductor mounted Y -upon theshaftffor -pscillation relative to the device of the class describedwthe.

device of the class described, a.`

. I'70 device of the class described, the

sav

contacts, and mechanism mounted for oscillation therein, springl device of the classdescribed, a

field magnet, av yoke mounted upon said ignition Spark in the combustion chamber shaft oi oscillation with said inductor, ofthe eiigiiie.

springs tending to retain the indiictoil and .Tn witness whereof, I hereunto subscribe shaft iii normal position, an engine-diiven my iiaiiie this 26th day of October, A. D.

5 i-iieiiibeifor oscillating said shaft and parts 1910.

iai-rieti thereby, separable electrical contact-s H f T Y. `N LE VI MILE h. within the combustion cylinder of the eii- J0 i S 0 gine, and an impactI meiiibei fixed relative VVitiieSsoS: to thc iiiihictor and Shaft arranged to effect ALEXANDER KISKADDEN, 10 the separation of said contacts to create an EUGENIA K. ADAMS.

Copies o this pateiit maybe obtained for five cents each, by addressing the Commissioner of Patents, i Washington, ZD. C. 

